A specimen of two rare Copper Arsenates from one of Cornwall's well known mines. Wheal Unity was a fine producer of many types of Arsenate species; particularly sought after are Clinoclase, and Olivenite. On the specimen we have to offer is a rich druse of deep blue Clinoclase intergrown with rich olive green Olivenite crystals. The specimen sparkles away in the light reflected from the many crystals faces.